View gets messier as I advance in a project
Feels like there is no point in dragging this subject on. I must say I haven't found a proper solution to reset all the views, navigation &amp; related functions / hotkeys when they aren't responding as they should anymore.
I don't know if I'm messing up at some point, accidently touching something I shouldn't.
Anyways, the work around I've found which works pretty well is to open a new blender project and copy paste my objects from the old one to the new .blend. As I do this, views and navigation are working properly again and I can go on with 3d modeling.
Thank you all for your suggestions, much appreciated. I still learned stuff :)
Best, 
Kira